If so, then watch this video I came across.

This was just uploaded and I decided it could potentially help a lot of people. Bad grounds can cause a whole variety of electrical problems.


By the way, South Main Auto is an excellent automotive repair channel on youtube. Eric is an expert at employing the diagnostic method to find problems (rather than firing the parts cannon at it). He's a guru with the electrical and scan tool side of things, which makes him especially good at pinpointing those hard to find electrical gremlins. These aren't expensive polished course videos where they work on shiny new vehicles. SMA is an actual repair shop, and Eric films himself repairing real customers' vehicles as they come in (often caked in rust). So it's as real as it gets. Actual vehicle owners don't have unlimited budgets, which makes these videos even more practical. If you search the SMA back catalog, there are some more van videos, and plenty of GM pickups (very similar).

keywords:
issue lights dim switch contact relay voltage drop start crank fuel pump frame battery engine block body chassis power wiring continuity resistance random stall misfire circuit gauge dial cluster fault flicker drain corrosion rust

 

This has been popping up on my YouTube main page all week.